Experimental Study on Film Cooling Flow Characteristics of Turbine Stator Blade at Different Setting Angles

The technology of film cooling is one of the most effective means of protecting the turbine blades. In this paper, flow structures of the turbine stator blade with six hole-rows at different blowing ratio (M=0.5, 1.0 and 1.5) and setting angles (beta=40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees and 90 degrees) was measured by Ply in piston flow type of low-speed wind tunnel laboratory. Velocity was analyzed. Results show that: velocity gradient of suction side was much higher than pressure side and increased with setting angle reduction; Adherence of film is influenced by setting angle and blowing ratio, when M=1.0 and beta=70 degrees anchorage dependent is best and suction side is greater than pressure side.